Abstract: A carcass structure for vehicle wheel tyres includes at least one carcass ply and a pair of annular reinforcing structures. The at least one carcass ply includes a first and a second series of strip segments consecutively arranged along a circumferential development of a toroidal support and including at least two filiform elements, positioned longitudinally and parallel to each other, at least partially coated by at least one layer of raw elastomer material. The annular reinforcing structures include at least one primary portion and at least one additional portion. The at least one primary portion includes a first circwnferentially-inextensible annular insert, a filling body, and at least one second circumferentially-inextensible annular insert. The at least one additional portion comprises at least one third circumferentially-inextensible annular insert. The annular inserts are each formed by at least one elongated element extending in concentric turns.

Abstract: An oscillating arm apparatus for manufacturing a tire reinforcement from a single cord in which the cord is deposited in contiguous arches on a rigid core by a system of arms arranged in series conveying an eyelet in such a way as to allow it to traverse a core and thus deposit adjacent arches.

Abstract: Method and apparatus for highly efficiently forming a tire reinforcing layer, such as a carcass ply or belt ply, either directly or indirectly on a rubber member which is supported on a rigid core having a toroidal shape. According to the invention, a continuous strip of reinforcing material comprised of a plurality of single cords or twisted cords is cut into reinforcing elements having a predetermined length. The reinforcing elements are successively fed to the rubber member from one side of the core, synchronously with an indexing movement of the core about its center axis. The reinforcing elements are then urged against the outer surface of the rubber member on the core along their longitudinal direction and thereby progressively pressure-joined to the rubber member.

Abstract: Formation of a carcass ply takes place by laying down onto a toroidal support (11), a first and a second series of strip-like sections (13, 14) cut to size from a continuous strip-like element (2a) and each comprising longitudinal thread-like elements (15) incorporated into a layer of elastomer material (18). The sections (13) of the first series are sequentially disposed at some circumferential distance from each other, to form side portions (19) to the end flaps (19a) of which primary portions (4a) of respective bead-reinforcing structures (4) are applied. The sections (14) of the second series are each interposed in the space defined between two sections of the first series (13), with the respective end flaps (20a) overlapping the primary portions (4a) of the annular structures (4). Additional portions (24) of the annular structures are applied to the end flaps (20a) of the sections (14) belonging to the second series.

Abstract: A method of forming a headliner includes providing a lap mat including a first region having a first material composition, and a second region having a second material composition different than the first composition, wherein the second region is configured as at least one of an energy management region and a support region; positioning the mat between two mold sections of a mold; and moving at least one of the mold sections toward the other mold section to shape the mat into a desired shape. A method for forming the mat is also disclosed.

Abstract: The invention relates to a pneumatic tire wherein the crown has a ply comprised of substantially circumferentially oriented cords which are spirally wound. The winding pitch p of said cords is greater than 2.5 times the cord diameter &PHgr;. The tread compound is applied directly on said cords. This arrangement facilitates tire fabrication and assures good adherence between the tread compound and the rest of the crown of the tire.

Abstract: A high transverse-curvature tire for two wheeled-vehicles comprises a carcass structure, a belt structure including radially-inner and radially-outer layers, and a tread. The radially-inner layer comprises at least one strip made of an elastomeric material incorporating a plurality of reinforcing cords essentially parallel to one another and oriented along directions inclined with respect to the equatorial plane of the tire. The radially-outer layer includes a plurality of circumferential coils, axially arranged side-by-side, of at least one circumferentially-inextensible cord wound at a substantially null angle with respect to the equatorial plane of the tire according to a winding direction adapted to compression-stress elastomeric material portions interposed between consecutive reinforcing cords incorporated in the at least one strip of the radially-inner layer.

Abstract: A pneumatic tire comprises a spiral belt formed by spirally winding a cord(s) along a circumferential direction of a torus tread, wherein the spiral belt is comprised of at least one layer constructed with a combination of two different cords each having an initial tension of not less than 50 cN/cord.

Abstract: A carcass ply producing apparatus for producing a carcass ply constituting a carcass layer of a tire comprises

Abstract: A rubber material for tire-constitutional member is laid on a rotating support at a high efficiency and a high accuracy by arranging a pair of rollers rotating in opposite directions in the vicinity of a radially outer surface portion of the support and utilizing a gap defined between the rollers as a roller die.

Abstract: To build vehicle tires, portions (9) of elastomeric material are placed successively one on top of the other on a building drum (18) having two halfdrums (22) of independently variable diameters; the longitudinal dimensions of at least one portion (9) being measured prior to feeding the portion (9) onto the building drum (18); and the diameter of each half-drum (22) being varied as a function of the longitudinal dimensions of the portion (9) to obtain an even overlap at all times of the opposite end edges (9a, 9b) of the portion (9) on the building drum (18).

Abstract: Method and apparatus for highly efficiently forming a tire reinforcing layer on an outer peripheral surface of a rigid core (13), in which ribbon pieces (33) each comprised of parallel rubber-coated cords (17) are successively adhered to the outer peripheral surface of the core (13) in a circumferential direction thereof, with the side edges of the ribbon pieces in close contact with those of adjacent ribbon pieces. A plurality of cords (17) can be set by one adhering operation, thereby reducing the number of adhering operations in forming a tire reinforcing layer.

Abstract: A radial force variation of a tire is corrected irrespectively of the kind of the organic fiber cord used, wherein a radial force variation (RFV) is measured at room temperature to specify a tire position indicating a minimum value of RFV, and an inner face of a tread portion is pushed and enlarged outward in a radial direction of the tire by a pushing means at a RFV bottom region sandwiching the position of the minimum RFV value from both sides thereof in a circumferential direction of the tread portion, and such a push enlarged state is kept for a given time.

Abstract: A vehicle tire is made by inflating a vulcanized air tube to a slight pressure. Then, at least one thread element is wound around the transverse profile of the air tube to form a first carcass ply consisting of turns disposed consecutively in side-by-side relationship. A pair of annular anchoring elements is applied to the first carcass ply. Then, a second carcass ply is formed by winding at least one thread element so as to form turns disposed consecutively in side-by-side relationship along the circumferential extension of the air tube. Associated with the carcass structure is an annular element made up of a belt structure and a tread band. The carcass structure and annular element can be vulcanized separately from each other to make a tire having a tread band susceptible of replacement together with the belt structure.

Abstract: Method and apparatus for producing tires, in which a carcass layer is formed by continuously feeding a carcass cord from a cord passage and applying the carcass cord over an outer peripheral surface of a substantially toroidal core so as to extend in a meridian direction of the core while the core is subjected to an indexing movement in its circumferential direction. The carcass cord is arranged so as to extend linearly from one end to the other end of the core with respect to a meridian direction thereof, and vice versa, under the operation of a feed mechanism which is capable of achieving a reciprocating movement. A turn-up portion of the carcass cord is wound on, and supported by a pin at the end of the core in the meridian direction, and subsequently adhered onto the core by a press head which can be advanced relative to the pin.

Abstract: At least one carcass ply is formed by depositing a strip element, comprising longitudinal thread elements incorporated into a layer of elastomer material, onto a toroidal support. Deposition of the strip element takes place in alternated deposition sections, each comprising two radially-extending side portions and a crown portion extending at a radially external position. The side portions of each deposition section are at least partly overlapped with side portions belonging to an adjacent deposition section. Associated with the carcass ply are an anchoring element. A belt structure, a tread band, and sidewalls are combined with the thus-formed carcass structure to define a tire to be submitted to a vulcanization step.

Abstract: In a tire for motor-vehicles, an auxiliary support element (9) is interposed between a carcass ply (3) and a belt structure (6). The support element is employed during the manufacturing step of the belt structure (6) in order to stably retain, on the sectors of a comb drum (10), coils (7a) consecutively formed by winding of an inextensible cord (7) therearound. The auxiliary support element (9) is made in the form of an elastomeric sheet containing short aramid fibers in an amount included between 1 and 10 parts by weight per 100 parts of elastomeric material, to increase the stretchability of said element without impairing its adhesiveness. The introduction of the short aramid fibers in the blend enables the thickness of the auxiliary support element (9) to be reduced to about 0.075 mm.

Abstract: An apparatus for manufacturing a tire reinforcement from a cord, cooperating with a substantially toroidal form on which arches of the cord are deposited according to a desired trajectory for the cord on the surface of the form, the apparatus having depositing members arranged on a support, the depositing members including a guide member in which the cord may slide freely, a mechanism for actuating the guide member in a cyclical, to-and-fro, movement, to bring the guide member in successive oscillations into the vicinity of each of the desired ends for the cord in the trajectory. The apparatus further includes a first motor imparting the desired movements to the actuating mechanism and a second motor for imparting to the depositing member support a cyclical movement synchronized with the actuating mechanism, allowing deflection of the final trajectory of the cord on the form.

Abstract: In a tire for motor-vehicles, an auxiliary support element (9) is interposed between a carcass ply (3) and a belt structure (6). The support element is employed during the manufacturing step of the belt structure (6) in order to stably retain, on the sectors of a comb drum (10), coils (7a) consecutively formed by winding of an inextensible cord (7) therearound. The auxiliary support element (9) is made in the form of an elastomeric sheet containing short aramid fibers in an amount included between 1 and 10 parts by weight per 100 parts of elastomeric material, to increase the stretchability of said element without impairing its adhesiveness. The introduction of the short aramid fibers in the blend enables the thickness of the auxiliary support element (9) to be reduced to about 0.075 mm.

Abstract: A a carcass has at least one endless carcass cord ply, which is formed by at least one carcass cord extending zigzag in the tire's circumferential direction while being folded at both outer ends of the endless carcass cord ply alternately to right and left. The bead core has an upper bead core portion which is formed by a bead cord being substantially continuous to the carcass cord and spirally wound on the endless carcass cord ply in one or more stages in the tire's circumferential direction.

Abstract: A strip member is wound by a tire building machine having a building drum for taking up a strip member of predetermined length without discrete ends and a transfer conveyor for feeding the strip member to the building drum. The winding-start end of the strip member transferred from the transfer conveyor to the building drum and the winding-finish end of the strip member are detected by means of end sensors, measuring the angle through which the building drum has rotated from the output of a winding start signal to the output of a winding finish signal in response to output signals from the sensors by means of an angle detector. A lapping margin between the winding start end and the winding finish end of the strip member is calculated based on the rotational angle and diameter of the building drum by means of an operational means.

Abstract: A pneumatic tire comprises a tread-sidewall reinforcement extending between the tire sidewall portions through the tread portion which has a symmetrical cord arrangement to prevent ply steer. The tread-sidewall reinforcement is made of a series of loops of at least one reinforcing cord which loops spread over the circumference of the tire. The tread-sidewall reinforcement can be formed as a carcass or a reinforcing layer disposed outside a carcass. When viewed in the radial direction, the inclination angle of the reinforcing cord with respect to the tire circumferential direction is substantially 90 degrees at the tire equator and decreases to substantially 0 degree gradually from the tire equator towards the bead portions. When viewed in the axial direction, the inclination angle of the reinforcing cord with respect to the radial direction is in the range of from 60 to 90 degrees.

Abstract: A method of manufacturing a radial tire is disclosed, wherein a tread ring is formed separately from a tire main body by the use of a tread ring forming apparatus. The radial tire comprises a belt having a camber and a band wound thereon. The tread ring is an annular assembly of a raw belt, a raw band wound thereon and a raw tread rubber. The tread ring forming apparatus comprising a belt drum made up of segments defining the drum circumference. In a cross section including the belt drum axis, the radially outer surface of each segment is a straight line parallel to the axis. In a cross section normal to the belt drum axis, the radially outer surface is an arc having one radius substantially equal to one half of the drum diameter, but the drum circumference is decreased in the belt edge portion than the central portion by increasing gaps between the segments.

Abstract: A pneumatic radial tire (20) comprises a radial carcass (22) of at least one ply, and a reinforcing belt (23) arranged on the outer peripheral side of the radial carcass (22). The reinforcing belt (23) is in the form of a helical belt layer (24) wherein a ribbon (40), which is comprised of a rubber (41) and a plurality of reinforcing cords (42) embedded in the rubber (41), is successively wound in a helical manner at an angle with respect to the circumferential direction of a tread portion. The ribbon (40) forming the helical belt layer (24) has a cross-section in which the reinforcing cords (42) are dispersed in the thickness and width directions of the ribbon (40).

Abstract: A thread guide for an apparatus for the manufacture of a reinforcement from a thread deposited directly in its final position by projecting lengths of the thread for laying the thread onto a receiving surface in which a pair of deflectors is provided for guiding and controlling the braking pressure exerted on the threads before discharge from a projection orifice and in which at least one deflector is adjusted relative to the other by pivotally adjusting the deflector and locking it in place.

Abstract: A band element for mounting in the crown portion of a pneumatic tire to provide run flat ability to the tire in the event of loss of air pressure and to provide increased puncture resistance is formed of flat strips of tape having fibers embedded in a resin matrix which in one embodiment are twisted and then pultruded to provide a rectangular cross sectional configuration. The twisted tape is wrapped about a mandrel and forms either the only layer, or the intermediate layer of a composite band in combination with inner and outer layers of flat tape or wound filament fibers, whereby the fibers in the tape extend across the central axis of the band to reduce interlaminar sheer. In another embodiment, a plurality of dimples or depressions are formed in the individual tape layers to extend a plurality of the fibers across the layer boundaries to reduce interlaminar sheer.

Abstract: A pneumatic tire comprises a ground contacting tread including a tread strip extending axially between tread edges and sidewalls extending radially inwardly from each tread edge to respective bead regions, the tread being reinforced by at least a first circumferentially extending breaker ply, characterized in that each sidewall is reinforced by a carcass half ply extending from a radially inward first edge in the bead region to a radially outward second edge in the tread axially between the center and adjacent edge of the breaker ply; the carcass half ply including one or more reinforcing elements wound continuously between the radially inner and outer edges of the carcass half ply and around the circumferential periphery of the tire.

Abstract: A pneumatic tire comprises a breaker disposed radially outside a carcass and having a cord angle of not less than 10 degrees, and a band disposed between the carcass and the breaker and having a cord angle of less than 10 degrees, the breaker having a double-layered cord structure comprising a radially outer layer and a radially inner layer between which the cord inclination is reversed, the band being made of spiral windings of at least one cord; and the breaker is preferably formed by continuously winding at least one cord zigzag around the radially outside of the band plural times, in each turn the tape being bent at the axial edges of the breaker.

Abstract: A reinforcement ply for an elastomeric article comprises a plurality of parallel extensible reinforcing members laid at a substantially constant end count perpendicular to their longitudinal direction, the ply having different extensibilities in the longitudinal direction of the reinforcing members in different parts of the ply. The reinforcing members are preferably made such that they each have at least one filament which is displaced perpendicularly from the longitudinal centerline of the reinforcing member in one part of the reinforcing member compared to another part. A tire may include the reinforcement ply as a hoop or band in the ground contacting tread region.

Abstract: A system for molding an endless tractor track by wrapping uncured rubber, calendered cord and wire cable onto the rim of a building and curing drum, positioning the drum within a curing mold, withdrawing the drum from the mold, chilling the drum and then separating the parts of the drum to remove the completed tractor track.

Abstract: A toroidal carcass is formed using a toroidal frame defined by two annular beads and by a removable outer ring divided into angular sectors; a winding device for feeding a spool, housing a cord, about and through the frame from a first to a last of the angular sectors; and an actuating device, which, before the cord is wound completely, moves the first angular sector into an operating position defining, with the last angular sector, an opening for the passage of the spool.

Abstract: A method of forming a green tire according to the present invention comprises winding a rubber strip on an adjusting drum while extruding an unvulcanized rubber from an extruder in a form of the rubber strip in a length corresponding to the rubber quantity of a tire constituent portion, and forming the tire constituent portion by winding said rubber strip continuously a plurality of times on the outer circumference of a rotary support member, unwinding it from the adjusting drum.

Abstract: In a tire for motor-vehicles, an auxiliary support element (9) is interposed between a carcass ply (3) and a belt structure (6). The support element is employed during the manufacturing step of the belt structure (6) in order to stably retain, on the sectors of a comb drum (10), coils (7a) consecutively formed by winding of an inextensible cord (7) therearound. The auxiliary support element (9) is made in the form of an elastomeric sheet containing short aramid fibers in an amount included between 1 and 10 parts by weight per 100 parts of elastomeric material, to increase the stretchability of said element without impairing its adhesiveness. The introduction of the short aramid fibers in the blend enables the thickness of the auxiliary support element (9) to be reduced to about 0.075 mm.

Abstract: A method of manufacturing a radial tire is disclosed, wherein a tread ring is formed separately from a tire main body by the use of a tread ring forming apparatus. The radial tire comprises a belt having a camber and a band wound thereon. The tread ring is an annular assembly of a raw belt, a raw band wound thereon and a raw tread rubber. The tread ring forming apparatus comprising a belt drum made up of segments defining the drum circumference. In a cross section including the belt drum axis, the radially outer surface of each segment is a straight line parallel to the axis. In a cross section normal to the belt drum axis, the radially outer surface is an arc having one radius substantially equal to one half of the drum diameter, but the drum circumference is decreased in the belt edge portion than the central portion by increasing gaps between the segments.

Abstract: The apparatus for the manufacture of a reinforcement from a thread deposited directly in its final position by projecting lengths of the thread for laying the thread onto a receiving surface (S). The apparatus includes an assembly (5) comprising rollers (15) for the advancing of thread (1), a rotary conduit (2), a knife (3) for cutting the thread and freeing a length (10) upon each turn of said rotary conduit (2), and a thread guide (4) to receive the cut lengths of thread. The thread guide comprises deflectors (43) exerting a pressure on the thread. The pressure of the deflectors can be adjusted by screws (7).

Abstract: An apparatus for the manufacture of a reinforcement from a thread directed in its final position by projecting lengths of the thread for laying the thread onto a receiving surface (S). The apparatus includes an assembly (5) having rollers (15) for the advancing of thread (1), a rotary conduit (2), a knife (3) for cutting the thread and freeing a length (10) upon each turn of said rotary conduit (2), and a thread guide (4) to receive the cut lengths of thread. The thread guide includes a cradle (41) provided with a fastening surface (42) which permits the detachable mounting of said thread guide (4) to said assembly (5).

Abstract: A control apparatus and method for a coating device utilize a measurement system to determine whether a body supplied to the coating device is acceptable for coating and/or to establish template data in preparation for a coating operation. The measurement system also obtains measurements of a body while the body is being coated, and these measurements are used to control the coating operation.

Abstract: A pneumatic vehicle tire includes a carcass, a tread strip, a breaker arrangement provided between the carcass and the tread strip and includes at least two breaker plies having threads or cords of non-metallic material which extend at a predetermined angle to the mid-circumferential plane of the tire and serve as reinforcing elements. A breaker cover surrounds the breaker arrangement, or at least in, regions of its width. The breaker cover includes at least one cover ply having threads or cords which extend at least substantially in the circumferential direction of the tire. The breaker cover has threads or cords of a heat-shrinking material substantially in the shoulder region of the tire. In the middle tire region lying between the threads or cords either no breaker cover is provided or a breaker cover is provided with threads or cords of a material with low thermal shrinkage or no thermal shrinkage.

Abstract: A a carcass has at least one endless carcass cord ply, which is formed by at least one carcass cord extending zigzag in the tire's circumferential direction while being folded at both outer ends of the endless carcass cord ply alternately to right and left. The bead core has an upper bead core portion which is formed by a bead cord being substantially continuous to the carcass cord and spirally wound on the endless carcass cord ply in one or more stages in the tire's circumferential direction.

Abstract: A run flat pneumatic tire is reinforced by a thin annular composite band imbedded in the crown portion of the tire in combination with a plurality of radial cords or plies in its sidewalls which have freedom in shear with respect to one another. The band is formed by a plurality of layers of material strips wherein each strip is wound in a helical pattern, with adjacent strips being wound at reverse angles to each other. Each layer is formed under sufficient pressure and at an elevated temperature whereby the band is prestressed in tension which decreases the maximum stress at the footprint area of the tire. The invention furthermore incorporates the method of imparting the prestress on the annular band during its manufacture.

Abstract: Process and device (1) for applying a thread (3) onto a support (9) while parting to the thread (3) a sinuous shape, which are characterized by the following features:a) the thread (3) is delivered with a controlled linear speed of value V.sub.1 ;b) the thread (3) is displaced transversely to its direction of advance;c) it is applied onto the support (9), the thread (3) and the support (9) at the contact being driven with a linear speed V.sub.2 which is less than V.sub.1 ;d) the conformation ratio of the thread (3) is thus defined by the ratio V.sub.1 /V.sub.2.Plies obtained by the process and device (1) of the invention.Articles, in particular tires, made using such plies.

Abstract: The machine for manufacturing a tire carcass half-reinforcement from a sie filament wrapped around a bead wire which includes: bead wire holders operated by actuating cylinders, allowing said bead wire to be held in a predetermined position; a ring which has half as many hooks as there will be arches of carcass filament contained in the tire that is to be manufactured, the ring being held a predetermined distance away from said bead wire; a reel of filament which is moved in the central space of the bead wire, wrapped around it, the path crossing the plane of the ring and passing radially inside it; and a mechanism for hooking the filament onto each of the hooks.

Abstract: A radial tire having two carcass half-reinforcements anchored on each side f the tire in a bead, the base of which is intended to be mounted on a bead seat of a wheel rim, each bead having at least one bead wire, the carcass half-reinforcements being joined together by connecting means. Each carcass half-reinforcement consists of a carcass filament which is wrapped around the bead wire to form adjacent strands running from said bead wire at least as far as said connecting means. The strands are arranged in a number of groups of two adjacent strands connected by a loop at the connecting means, the two adjacent strands of each group passing axially on the same side of the bead wire, and alternately axially on one side then on the other side of the bead wire, when passing from one group to the next group.

Abstract: A method of preparing a ply of composite material by applying an adhesive to a textile material comprising greige cords, so as to achieve an acceptable bond between the cords an elastomeric matrix, while not significantly altering the properties of the cords, is provided. The textile material comprises warp cords and weft cords; the weft cords are used to convey the warp cords through a heat setting oven without applying substantial tension to the warp cords, so as to not change their stress-strain properties. In the illustrated embodiment, the warp cords are aramid cords having a linear density of 500 to 3600 Denier and a twist multiplier of 5 to 8. The cords can be used in a crown reinforcing spirally wound overlay structure of a tire.

Abstract: A pneumatic vehicle tire having a belt layer at the outside of a carcass layer of the tread, wherein a plurality of mutually parallel reinforcement cords are wound back and forth in a spiral at a predetermined angle to the longitudinal direction and embedded in a matrix of a lateral flattened tubular cross-section to form a continuous tape and the continuous tape is continuously wound around the outer circumference of the carcass layer a plurality of times in a spiral to form the belt layer or a pneumatic vehicle tire having a continuous tape, composed of a two-layer construction consisting of a plurality of aligned rubberized reinforcement cords wound in a spiral to form a lateral flattened tubular cross-section and an elastic cord inserted inside the flattened tube along its longitudinal direction as a core member, continuously wound over an outer circumference of a carcass layer at a tread in a spiral with a slight angle with respect to the tire circumferential direction to form a belt layer.

Abstract: A winding unit (14) for forming a toroidal carcass (1) by winding a textile cord (5) in a spiral about a toroidal frame (7) defined by two coaxial annular beads (2) and by a removable annular element (9) located outwards of the beads (2) to define, with the beads (2), two annular openings (11); the unit (14) presenting a plate element (16) releasably connectable to the annular element (9), and a sprocket chain (27) supporting a spool (43) for the cord (5), and movable continuously, along a groove (25) formed on the plate element (16) and defining an endless path (P), to form a toroidal reticulated structure (4) about the annular element (9) and the beads (2); the endless path (P) presenting a C-shaped branch (P1) extending, in use, about the annular element (9), and an omega-shaped branch (P2) extending about a hole (21) for the passage of a respective bead (2), about the annular element (9), and through the two annular openings (11).

Abstract: A pneumatic vehicle tire comprises a single ply or multi-ply radial carcass anchored to beads, a tread, and a breaker arrangement provided between the carcass and the tread. The breaker arrangement is preferably built up of at least two cut breaker plies with the threads or cords of the cut breaker plies, which serve as strength carriers and extend parallel to one another in the respective ply, crossing at a predetermined angle to the central mid-circumferential plane. The tire also comprises at least one cover ply of cords or threads extending substantially in the circumferential direction of the tire, at least one cover ply surrounding the breaker arrangement at least in the breaker arrangement's edge regions. In the preferred embodiment the breaker arrangement (4) has threads or cords (9) of non-metallic material and a material with a low thermal shrinkage or no thermal shrinkage is used as the material for the treads or cords (8) of the at least one cover ply (5).

Abstract: A pneumatic radial tire includes a cylindrical steel cord belt layer having a two-layered structure is formed by winding a tape obtained by burying one or a plurality of steel cords in parallel with one another in a matrix, round the outer circumference of a carcass layer on a tread while bending the tape zigzag.

Abstract: A process for the manufacture of a tire which consists of producing a toral carcass reinforcement blank (1) by the helical winding of a cord or cable around a non-deformable, annular building core N, followed by at least one circumferential cut on the radially inner surface of the core N and a cut on the radially outer surface, the two halves of the blank being then separated axially to permit the removal of the core and subsequently brought together and connected for the finishing of the blank of the tire.

Abstract: A pneumatic radial tire for use in heavy duty vehicles comprises a belt having a particular structure wherein a rubberized strip containing one or more cords is slantly extended from one of both side edges of the belt toward the other side edge with respect to an equatorial plane of the tire and continuously extended substantially zigzag in a circumferential direction of the tread while bending at each side edge of the belt at different inclination angles of the strip with respect to the equatorial plane in each of side regions of the belt before and after the bending at the side edge.